I am also curious on whether we would peak somewhere between now and 70ies OR go all the way to 90-95% in dominance.
That's a retard variable. A new digital craptocurrency is created every second and you can prop up a billion dollar market cap coin by having a buy side of....$1. So it's an illiquid asset, but will still cause Bitcoin "market dominance" to decrease. Not that Bitcoin is that liquid of an "asset" either.